# HELP Solve for R and I

#### tjjam2003

Joined Apr 5, 2006
22
In a Series-Parallel circuit, how do you find the resistance and the current if only the voltage is given? 5 resistors in series and 1 resistor in parallel.

R1= 3 ohm Voltage= 3V Current 1A
R2= 5 ohm Voltage =1.65 current 0.33A

R3= ??? voltage= 4 volts (parallel)

R4= 4 ohm Voltage 1.32 Current 0.33
R5= 1 ohm voltage 1 volt current 1A
R6=3ohm voltage 0.99 current 0.33

#### hgmjr

Joined Jan 28, 2005
9,029
Your problem would be clearer and easier to solve if you could provide a sketch of the circuit.

hgmjr

#### david mendes

Joined Mar 23, 2006
6
Your values seem uncoherent... the only possibility to underestand the problem is by designing the circuit...
Dd.

#### JoeJester

Joined Apr 26, 2005
4,390
With your detail, I don't see your initial standard ... 5 resistors in series and 1 in parallel.

I can see three branches in parallel, one single resistor, on with two in series, and one with three in series.

If there is an associated drawing, post it.

#### windoze killa

Joined Feb 23, 2006
605
I also responded to this somewhere else. Your values do not make sense.

#### n9xv

Joined Jan 18, 2005
329
Draw it. Use paint/Paintbrush, zip it, post it.

#### thingmaker3

Joined May 16, 2005
5,084
Originally posted by tjjam2003+Apr 5 2006, 08:13 AM--><div class='quotetop'>QUOTE(tjjam2003 @ Apr 5 2006, 08:13 AM)</div><div class='quotemain'>In a Series-Parallel circuit, how do you find the resistance and the current if only the voltage is given?
[post=15853]Quoted post[/post]​
[/b]

You don't.

<!--QuoteBegin-tjjam2003
@Apr 5 2006, 08:13 AM
5 resistors in series and 1 resistor in parallel.

R1= 3 ohm Voltage= 3V Current 1A
R2= 5 ohm Voltage =1.65 current 0.33A

R3= ??? voltage= 4 volts (parallel)

R4= 4 ohm Voltage 1.32 Current 0.33
R5= 1 ohm voltage 1 volt current 1A
R6=3ohm voltage 0.99 current 0.33
[post=15853]Quoted post[/post]​
[/quote]

Okay... R1 and R5 are in series with each other, yes? 1A each and 4v across the two of them.

R2, R4, and R6 are in series as well... 1/3 amp each and about 4V across the three of them.

If R3 is also in parallel, then there is no way to know current or resistance, save that R>0.

If the above is wrong, then the numbers given are also wrong.

#### Mazaag

Joined Oct 23, 2004
255
Originally posted by n9xv@Apr 5 2006, 06:41 PM
Draw it. Use paint/Paintbrush, zip it, post it.
[post=15877]Quoted post[/post]​ √ Draw It , Paint It , View It, Change It, Print It, Zip It , Post - Upload It √ 